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  <ul>
    <li><a href="#一说明">一、说明</a></li>
    <li><a href="#二gridviewcount">二、<code>GridView.count</code></a>
      <ul>
        <li><a href="#1常用构造函数的命名参数">1、常用构造函数的命名参数</a></li>
        <li><a href="#2构造-gridviewcount-的-children-列表">2、构造 GridView.count 的 children 列表</a></li>
        <li><a href="#3单个卡片内容">3、单个卡片内容</a></li>
        <li><a href="#4-完整的-gridview-列表内容">4、 完整的 GridView 列表内容</a></li>
      </ul>
    </li>
    <li><a href="#三gridviewbuilder-及-新闻双列流页面">三、<code>GridView.builder</code> 及 新闻双列流页面</a>
      <ul>
        <li><a href="#1gridviewbuilder-构造函数">1、GridView.builder 构造函数</a></li>
        <li><a href="#2itembuilder-方法">2、itemBuilder() 方法</a></li>
        <li><a href="#3单张卡片-widget">3、单张卡片 Widget</a></li>
        <li><a href="#4gridview-列表构造的代码">4、GridView 列表构造的代码：</a></li>
        <li><a href="#5双列流新闻列表">5、双列流新闻列表</a></li>
      </ul>
    </li>
    <li><a href="#四完整代码">四、完整代码</a></li>
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    <article class="post">
        <header>
            <h1 class="post-title">Flutter组件GridView.count及GridView</h1>
        </header>
        <date class="post-meta meta-date">
            2021年9月1日
        </date>
        
        <div class="post-meta">
            <span>|</span>
            
            <span class="meta-category"><a href='/categories/Flutter'>Flutter</a></span>
            
            <span class="meta-category"><a href='/categories/dart'>dart</a></span>
            
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                    阅读</span></span>
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        <div class="post-content">
            <h2 id="一说明">一、说明</h2>
<p>Flutter 中列表一般有两种表现形式，一种是 ListView 的列表形式，另一种就是 GridView 的宫格列表形式。</p>
<p>当然 GridView 不一定只能做列表，做九宫格的操作菜单也是 OK 的。</p>
<p>目前手机淘宝或者是小红书类的种草类内容基本都会选择 <strong>双列流</strong> 的显示形式，双列流对于内容在聚合页的曝光有很大的作用，Flutter 中可以借助 GridView 实现双列流或者多列流的数据。</p>
<p><code>GridView</code> 有五个可用构造函数：</p>
<ul>
<li><code>GridView</code></li>
<li><code>GridView.count</code></li>
<li><code>GridView.builder</code></li>
<li><code>GridView.custom</code></li>
<li><code>GridView.extent</code></li>
</ul>
<p>这里主要实践 <code>GridView.count</code> 和 <code>GridView.builder</code> 使用比较多的两个命名构造。</p>
<h2 id="二gridviewcount">二、<code>GridView.count</code></h2>
<h3 id="1常用构造函数的命名参数">1、常用构造函数的命名参数</h3>
<p><code>GridView.count</code> 接收下面的命名参数:</p>
<p>其中 <code>crossAxisCount</code> 是必传的，用来控制<strong>横轴上子项的个数</strong>，</p>
<p><code>mainAxisSpacing</code> 用来指定横轴上两列的宽度间隙</p>
<p><code>mainAxisSpacing</code> 用来指定纵轴上两行的高度间隙</p>
<p><code>childAspectRatio</code> 则是用来指定卡片的宽高比例</p>
<p><code>children</code> 是一个 <code>List&lt;Widget&gt;</code> 类型数据，也是整个 GridView 的列表，使用 <code>GridView.count</code> 需要先构造好这个列表</p>
<div class="highlight"><pre style="color:#f8f8f2;background-color:#272822;-moz-tab-size:4;-o-tab-size:4;tab-size:4"><code class="language-dart" data-lang="dart">    Key key,
    Axis scrollDirection <span style="color:#f92672">=</span> Axis.vertical,
    <span style="color:#66d9ef">bool</span> reverse <span style="color:#f92672">=</span> <span style="color:#66d9ef">false</span>,
    ScrollController controller,
    <span style="color:#66d9ef">bool</span> primary,
    ScrollPhysics physics,
    <span style="color:#66d9ef">bool</span> shrinkWrap <span style="color:#f92672">=</span> <span style="color:#66d9ef">false</span>,
    EdgeInsetsGeometry padding,
    <span style="color:#960050;background-color:#1e0010">@</span>required <span style="color:#66d9ef">int</span> crossAxisCount,
    <span style="color:#66d9ef">double</span> mainAxisSpacing <span style="color:#f92672">=</span> <span style="color:#ae81ff">0.0</span>,
    <span style="color:#66d9ef">double</span> crossAxisSpacing <span style="color:#f92672">=</span> <span style="color:#ae81ff">0.0</span>,
    <span style="color:#66d9ef">double</span> childAspectRatio <span style="color:#f92672">=</span> <span style="color:#ae81ff">1.0</span>,
    <span style="color:#66d9ef">bool</span> addAutomaticKeepAlives <span style="color:#f92672">=</span> <span style="color:#66d9ef">true</span>,
    <span style="color:#66d9ef">bool</span> addRepaintBoundaries <span style="color:#f92672">=</span> <span style="color:#66d9ef">true</span>,
    <span style="color:#66d9ef">bool</span> addSemanticIndexes <span style="color:#f92672">=</span> <span style="color:#66d9ef">true</span>,
    <span style="color:#66d9ef">double</span> cacheExtent,
    List<span style="color:#f92672">&lt;</span>Widget<span style="color:#f92672">&gt;</span> children <span style="color:#f92672">=</span> <span style="color:#66d9ef">const</span> <span style="color:#f92672">&lt;</span>Widget<span style="color:#f92672">&gt;</span>[],
    <span style="color:#66d9ef">int</span> semanticChildCount,
    DragStartBehavior dragStartBehavior <span style="color:#f92672">=</span> DragStartBehavior.start,
</code></pre></div><h3 id="2构造-gridviewcount-的-children-列表">2、构造 GridView.count 的 children 列表</h3>
<p>上面提到：</p>
<blockquote>
<p><code>children</code> 是一个 <code>List&lt;Widget&gt;</code> 类型数据，也是整个 GridView 的列表，使用 <code>GridView.count</code> 需要先构造好这个列表</p>
</blockquote>
<p>这里 mock 了一个列表，然后通过一个方法 <code>_getGridList</code> 去构造 <code>List&lt;Widget&gt;</code> 列表，</p>
<div class="highlight"><pre style="color:#f8f8f2;background-color:#272822;-moz-tab-size:4;-o-tab-size:4;tab-size:4"><code class="language-dart" data-lang="dart">  List _list <span style="color:#f92672">=</span> List.generate(<span style="color:#ae81ff">90</span>, (index) {
    <span style="color:#66d9ef">return</span> index;
  });

  <span style="color:#75715e">// 生成一个列表
</span><span style="color:#75715e"></span>  List<span style="color:#f92672">&lt;</span>Widget<span style="color:#f92672">&gt;</span> _getGridList() {
    <span style="color:#66d9ef">return</span> _list.map((item) {
      <span style="color:#66d9ef">return</span> GridViewItem();
    }).toList();
  }
</code></pre></div><h3 id="3单个卡片内容">3、单个卡片内容</h3>
<p><code>GridViewItem</code> 是单个卡片内容，这里就随便写个简单的就可以：</p>
<div class="highlight"><pre style="color:#f8f8f2;background-color:#272822;-moz-tab-size:4;-o-tab-size:4;tab-size:4"><code class="language-dart" data-lang="dart"><span style="color:#66d9ef">class</span> <span style="color:#a6e22e">GridViewItem</span> <span style="color:#66d9ef">extends</span> StatelessWidget {
  <span style="color:#960050;background-color:#1e0010">@</span>override
  Widget build(BuildContext context) {
    <span style="color:#66d9ef">return</span> Container(
      child: Text(<span style="color:#e6db74">&#39;文本&#39;</span>),
      color: Colors.pink[<span style="color:#ae81ff">200</span>],
    );
  }
}
</code></pre></div><h3 id="4-完整的-gridview-列表内容">4、 完整的 GridView 列表内容</h3>
<blockquote>
<p>不列出 GridViewItem 组件代码和页面框架代码，完整代码可以在文章最后找到</p>
</blockquote>
<div class="highlight"><pre style="color:#f8f8f2;background-color:#272822;-moz-tab-size:4;-o-tab-size:4;tab-size:4"><code class="language-dart" data-lang="dart"><span style="color:#66d9ef">class</span> <span style="color:#a6e22e">HomeContent</span> <span style="color:#66d9ef">extends</span> StatelessWidget {
  List _list <span style="color:#f92672">=</span> List.generate(<span style="color:#ae81ff">90</span>, (index) {
    <span style="color:#66d9ef">return</span> index;
  });

  <span style="color:#75715e">// 生成一个列表
</span><span style="color:#75715e"></span>  List<span style="color:#f92672">&lt;</span>Widget<span style="color:#f92672">&gt;</span> _getGridList() {
    <span style="color:#66d9ef">return</span> _list.map((item) {
      <span style="color:#66d9ef">return</span> GridViewItem();
    }).toList();
  }

  <span style="color:#960050;background-color:#1e0010">@</span>override
  Widget build(BuildContext context) {
    <span style="color:#66d9ef">return</span> GridView.count(
      children: _getGridList(),
      crossAxisCount: <span style="color:#ae81ff">2</span>,
      padding: EdgeInsets.all(<span style="color:#ae81ff">10</span>),
      crossAxisSpacing: <span style="color:#ae81ff">20</span>,
      <span style="color:#75715e">// 水平距离
</span><span style="color:#75715e"></span>      mainAxisSpacing: <span style="color:#ae81ff">20</span>,
      <span style="color:#75715e">// 垂直距离
</span><span style="color:#75715e"></span>      childAspectRatio: <span style="color:#ae81ff">3.5</span><span style="color:#f92672">/</span><span style="color:#ae81ff">4</span>, <span style="color:#75715e">// 宽高比例
</span><span style="color:#75715e"></span>    );
  }
}
</code></pre></div><p>最终效果：</p>
<p>
        <a data-fancybox="gallery" href="https://luckly007.oss-cn-beijing.aliyuncs.com/image/2490855435.gif">
            <img class="mx-auto" alt="1.gif" src="https://luckly007.oss-cn-beijing.aliyuncs.com/image/2490855435.gif" />
        </a>
    </p>
<h2 id="三gridviewbuilder-及-新闻双列流页面">三、<code>GridView.builder</code> 及 新闻双列流页面</h2>
<h3 id="1gridviewbuilder-构造函数">1、GridView.builder 构造函数</h3>
<div class="highlight"><pre style="color:#f8f8f2;background-color:#272822;-moz-tab-size:4;-o-tab-size:4;tab-size:4"><code class="language-dart" data-lang="dart">  <span style="color:#75715e">/// Creates a scrollable, 2D array of widgets that are created on demand.
</span><span style="color:#75715e"></span>  <span style="color:#75715e">///
</span><span style="color:#75715e"></span>  <span style="color:#75715e">/// This constructor is appropriate for grid views with a large (or infinite)
</span><span style="color:#75715e"></span>  <span style="color:#75715e">/// number of children because the builder is called only for those children
</span><span style="color:#75715e"></span>  <span style="color:#75715e">/// that are actually visible.
</span></code></pre></div><p>从上面的注释可以看出，和 <code>LiewView.builder</code> 一样，<code>GridView.builder</code> 能够做到在子项 Widget 显示的时候再去创建，从而提高性能。</p>
<p>与 <code>GridView.count</code> 不同的是，<code>GridView.builder</code> 控制卡片间隔、比例的几个参数不是直接通过构造函数传参，而是通过 <code>gridDelegate</code> 参数传递给 Widget</p>
<p><code>final SliverGridDelegate gridDelegate;</code> <code>gridDelegate</code> 是 <code>SliverGridDelegate </code>类型，主要是用来控制 GridView 的 子 Widget 的样式啥的</p>
<p>同样的，除了 <code>gridDelegate</code> 是 required 之外，<code>itemBuilder</code> 也是 required 的，其他的构造参数如下：</p>
<div class="highlight"><pre style="color:#f8f8f2;background-color:#272822;-moz-tab-size:4;-o-tab-size:4;tab-size:4"><code class="language-dart" data-lang="dart">    Key key,
    Axis scrollDirection <span style="color:#f92672">=</span> Axis.vertical,
    <span style="color:#66d9ef">bool</span> reverse <span style="color:#f92672">=</span> <span style="color:#66d9ef">false</span>,
    ScrollController controller,
    <span style="color:#66d9ef">bool</span> primary,
    ScrollPhysics physics,
    <span style="color:#66d9ef">bool</span> shrinkWrap <span style="color:#f92672">=</span> <span style="color:#66d9ef">false</span>,
    EdgeInsetsGeometry padding,
    <span style="color:#960050;background-color:#1e0010">@</span>required <span style="color:#66d9ef">this</span>.gridDelegate,
    <span style="color:#960050;background-color:#1e0010">@</span>required IndexedWidgetBuilder itemBuilder,
    <span style="color:#66d9ef">int</span> itemCount,
    <span style="color:#66d9ef">bool</span> addAutomaticKeepAlives <span style="color:#f92672">=</span> <span style="color:#66d9ef">true</span>,
    <span style="color:#66d9ef">bool</span> addRepaintBoundaries <span style="color:#f92672">=</span> <span style="color:#66d9ef">true</span>,
    <span style="color:#66d9ef">bool</span> addSemanticIndexes <span style="color:#f92672">=</span> <span style="color:#66d9ef">true</span>,
    <span style="color:#66d9ef">double</span> cacheExtent,
    <span style="color:#66d9ef">int</span> semanticChildCount,
</code></pre></div><h3 id="2itembuilder-方法">2、itemBuilder() 方法</h3>
<p><code>itemBuilder</code> 和 ListView.builder 一样，也是一个 <code>IndexedWidgetBuilder</code>，接受 context 和 index 两个参数，然后返回一个 Widget 即可</p>
<p>这里使用了 mock 的新闻数据，来自 网易新闻的接口，可以在 <a href="https://github.com/postbird/FlutterHelloWorldDemo/blob/master/demo1/lib/mock/list.dart">https://github.com/postbird/FlutterHelloWorldDemo/blob/master/demo1/lib/mock/list.dart</a> 找到列表数据</p>
<p>完整代码可以在文章最后找到。</p>
<div class="highlight"><pre style="color:#f8f8f2;background-color:#272822;-moz-tab-size:4;-o-tab-size:4;tab-size:4"><code class="language-dart" data-lang="dart">  <span style="color:#75715e">// builder
</span><span style="color:#75715e"></span>  Widget _itemBuilderFunc(BuildContext context, <span style="color:#66d9ef">int</span> index) {
    <span style="color:#66d9ef">final</span> Map news <span style="color:#f92672">=</span> newsList.news[index];
    <span style="color:#66d9ef">return</span> GridViewItem(
      cover: news[<span style="color:#e6db74">&#39;imgurl&#39;</span>],
      title: news[<span style="color:#e6db74">&#39;title&#39;</span>],
      time: news[<span style="color:#e6db74">&#39;time&#39;</span>].toString(),
    );
  }
</code></pre></div><h3 id="3单张卡片-widget">3、单张卡片 Widget</h3>
<p><code>GridViewItem</code> 是构造的比较常见的双列流卡片，封面图+标题 的样式</p>
<p><code>GridViewItem</code> 组成如下：</p>
<div class="highlight"><pre style="color:#f8f8f2;background-color:#272822;-moz-tab-size:4;-o-tab-size:4;tab-size:4"><code class="language-dart" data-lang="dart"><span style="color:#f92672">|-</span> GridView
  <span style="color:#f92672">|-</span> Container
    <span style="color:#f92672">|-</span> Column
      <span style="color:#f92672">|-</span> GridViewTitleCover  <span style="color:#75715e">// 封面图 Widget
</span><span style="color:#75715e"></span>      <span style="color:#f92672">|-</span> SizedBox 
      <span style="color:#f92672">|-</span> GridViewItemTitle    <span style="color:#75715e">// 标题 Widget
</span><span style="color:#75715e"></span>      <span style="color:#f92672">|-</span> GridViewItemTime    <span style="color:#75715e">// 时间 Widget
</span></code></pre></div><p><code>GridViewItem</code> 接收三个参数，<code>cover</code> 、 <code>title</code> 、 <code>time</code>：</p>
<div class="highlight"><pre style="color:#f8f8f2;background-color:#272822;-moz-tab-size:4;-o-tab-size:4;tab-size:4"><code class="language-dart" data-lang="dart"><span style="color:#66d9ef">class</span> <span style="color:#a6e22e">GridViewItem</span> <span style="color:#66d9ef">extends</span> StatelessWidget {
  GridViewItem({<span style="color:#66d9ef">this</span>.cover, <span style="color:#66d9ef">this</span>.title, <span style="color:#66d9ef">this</span>.time});

  <span style="color:#66d9ef">String</span> cover;
  <span style="color:#66d9ef">String</span> title;
  <span style="color:#66d9ef">String</span> time;

  <span style="color:#960050;background-color:#1e0010">@</span>override
  Widget build(BuildContext context) {
    <span style="color:#66d9ef">return</span> Container(
      child: Column(
        children: <span style="color:#f92672">&lt;</span>Widget<span style="color:#f92672">&gt;</span>[
          GridViewTitleCover(<span style="color:#66d9ef">this</span>.cover),
          SizedBox(height: <span style="color:#ae81ff">10</span>),
          GridViewItemTitle(title: <span style="color:#66d9ef">this</span>.title),
          GridViewItemTime(time: <span style="color:#66d9ef">this</span>.time)
        ],
      ),
      decoration: BoxDecoration(
          borderRadius: BorderRadius.all(Radius.circular(<span style="color:#ae81ff">6</span>)),
          color: Colors.grey[<span style="color:#ae81ff">200</span>]),
    );
  }
}
</code></pre></div><h4 id="1封面图-widget">1、封面图 Widget</h4>
<p>这里有个坑， 上面可以看到，卡片是四边圆角 6，Container 的圆角控制的，但是一旦 Image Widget 覆盖上去了，就会盖住下面的 Container 的圆角，因此 Image 也必须是圆角的，而设置圆角的 Image，这里借助 Container+Image (BoxDecoration) 实现圆角图片</p>
<p>外层卡片的 Container 实现的是四边圆角，而我们的图片只需要上面两个角设置圆角即可： <code>borderRadius: BorderRadius.vertical(top: Radius.circular(6)),</code></p>
<div class="highlight"><pre style="color:#f8f8f2;background-color:#272822;-moz-tab-size:4;-o-tab-size:4;tab-size:4"><code class="language-dart" data-lang="dart"><span style="color:#66d9ef">class</span> <span style="color:#a6e22e">GridViewTitleCover</span> <span style="color:#66d9ef">extends</span> StatelessWidget {
  GridViewTitleCover(<span style="color:#66d9ef">this</span>.cover);

  <span style="color:#66d9ef">final</span> <span style="color:#66d9ef">String</span> cover;

  <span style="color:#960050;background-color:#1e0010">@</span>override
  Widget build(BuildContext context) {
    <span style="color:#66d9ef">return</span> Container(
        height: <span style="color:#ae81ff">150</span>,
        decoration: BoxDecoration(
          borderRadius: BorderRadius.vertical(top: Radius.circular(<span style="color:#ae81ff">6</span>)),
          image: DecorationImage(
              image: NetworkImage(<span style="color:#66d9ef">this</span>.cover), fit: BoxFit.cover),
        ));
  }
}
</code></pre></div><h4 id="2标题-widget">2、标题 Widget</h4>
<div class="highlight"><pre style="color:#f8f8f2;background-color:#272822;-moz-tab-size:4;-o-tab-size:4;tab-size:4"><code class="language-dart" data-lang="dart"><span style="color:#66d9ef">class</span> <span style="color:#a6e22e">GridViewItemTitle</span> <span style="color:#66d9ef">extends</span> StatelessWidget {
  GridViewItemTitle({<span style="color:#66d9ef">this</span>.title});

  <span style="color:#66d9ef">final</span> <span style="color:#66d9ef">String</span> title;

  <span style="color:#960050;background-color:#1e0010">@</span>override
  Widget build(BuildContext context) {
    <span style="color:#66d9ef">return</span> Container(
      child: Text(
        <span style="color:#66d9ef">this</span>.title,
        maxLines: <span style="color:#ae81ff">2</span>,
        overflow: TextOverflow.ellipsis,
        style: TextStyle(fontSize: <span style="color:#ae81ff">12</span>),
      ),
      padding: EdgeInsets.fromLTRB(<span style="color:#ae81ff">5</span>, <span style="color:#ae81ff">0</span>, <span style="color:#ae81ff">5</span>, <span style="color:#ae81ff">0</span>),
    );
  }
}
</code></pre></div><h4 id="3时间-widget">3、时间 Widget</h4>
<div class="highlight"><pre style="color:#f8f8f2;background-color:#272822;-moz-tab-size:4;-o-tab-size:4;tab-size:4"><code class="language-dart" data-lang="dart"><span style="color:#66d9ef">class</span> <span style="color:#a6e22e">GridViewItemTime</span> <span style="color:#66d9ef">extends</span> StatelessWidget {
  GridViewItemTime({<span style="color:#66d9ef">this</span>.time});

  <span style="color:#66d9ef">final</span> <span style="color:#66d9ef">String</span> time;

  <span style="color:#960050;background-color:#1e0010">@</span>override
  Widget build(BuildContext context) {
    <span style="color:#66d9ef">return</span> Container(
      child: Text(
        <span style="color:#66d9ef">this</span>.time,
        maxLines: <span style="color:#ae81ff">1</span>,
        style: TextStyle(fontSize: <span style="color:#ae81ff">10</span>, color: Colors.black38),
      ),
      alignment: Alignment.bottomRight,
      padding: EdgeInsets.fromLTRB(<span style="color:#ae81ff">5</span>, <span style="color:#ae81ff">5</span>, <span style="color:#ae81ff">5</span>, <span style="color:#ae81ff">0</span>),
    );
  }
}
</code></pre></div><h3 id="4gridview-列表构造的代码">4、GridView 列表构造的代码：</h3>
<div class="highlight"><pre style="color:#f8f8f2;background-color:#272822;-moz-tab-size:4;-o-tab-size:4;tab-size:4"><code class="language-dart" data-lang="dart"><span style="color:#66d9ef">class</span> <span style="color:#a6e22e">HomeContent</span> <span style="color:#66d9ef">extends</span> StatelessWidget {
  <span style="color:#75715e">// builder
</span><span style="color:#75715e"></span>  Widget _itemBuilderFunc(BuildContext context, <span style="color:#66d9ef">int</span> index) {
    <span style="color:#66d9ef">final</span> Map news <span style="color:#f92672">=</span> newsList.news[index];
    <span style="color:#66d9ef">return</span> GridViewItem(
      cover: news[<span style="color:#e6db74">&#39;imgurl&#39;</span>],
      title: news[<span style="color:#e6db74">&#39;title&#39;</span>],
      time: news[<span style="color:#e6db74">&#39;time&#39;</span>].toString(),
    );
  }

  <span style="color:#75715e">// GridView.builder
</span><span style="color:#75715e"></span>  <span style="color:#960050;background-color:#1e0010">@</span>override
  Widget build(BuildContext context) {
    <span style="color:#66d9ef">return</span> GridView.builder(
      itemCount: newsList.news.length,
      itemBuilder: <span style="color:#66d9ef">this</span>._itemBuilderFunc,
      padding: EdgeInsets.fromLTRB(<span style="color:#ae81ff">12</span>, <span style="color:#ae81ff">12</span>, <span style="color:#ae81ff">12</span>, <span style="color:#ae81ff">0</span>),
      gridDelegate: SliverGridDelegateWithFixedCrossAxisCount(
          crossAxisCount: <span style="color:#ae81ff">2</span>,
          crossAxisSpacing: <span style="color:#ae81ff">10</span>,
          mainAxisSpacing: <span style="color:#ae81ff">10</span>,
          childAspectRatio: <span style="color:#ae81ff">0.75</span>),
    );
  }
}
</code></pre></div><h3 id="5双列流新闻列表">5、双列流新闻列表</h3>
<p>
        <a data-fancybox="gallery" href="http://www.ptbird.cn/usr/uploads/2019/07/1711827857.gif">
            <img class="mx-auto" alt="2.gif" src="http://www.ptbird.cn/usr/uploads/2019/07/1711827857.gif" />
        </a>
    </p>
<h2 id="四完整代码">四、完整代码</h2>
<p>GridView.count 实践代码：</p>
<ul>
<li><a href="https://github.com/postbird/FlutterHelloWorldDemo/blob/master/demo1/lib/bak/main.13-GridView.dart">https://github.com/postbird/FlutterHelloWorldDemo/blob/master/demo1/lib/bak/main.13-GridView.dart</a></li>
</ul>
<p>GridView.builder 实践代码：</p>
<ul>
<li><a href="https://github.com/postbird/FlutterHelloWorldDemo/blob/master/demo1/lib/bak/main.14-GridView.builder%26%E5%8F%8C%E5%88%97%E6%B5%81.dart">https://github.com/postbird/FlutterHelloWorldDemo/blob/master/demo1/lib/bak/main.14-GridView.builder%26%E5%8F%8C%E5%88%97%E6%B5%81.dart</a></li>
</ul>

        </div>

        
<div class="post-archive">
    <ul class="post-copyright">
        <li><strong>原文作者：</strong><a rel="author" href="https://luckly.work/">luckly</a></li>
        <li style="word-break:break-all"><strong>原文链接：</strong><a href="https://luckly.work/post/flutter_widget/Flutter%E7%BB%84%E4%BB%B6GridView.count%E5%8F%8AGridView.builder/">https://luckly.work/post/flutter_widget/Flutter%E7%BB%84%E4%BB%B6GridView.count%E5%8F%8AGridView.builder/</a></li>
        <li><strong>版权声明：</strong>本作品采用<a rel="license" href="https://creativecommons.org/licenses/by-nc-nd/4.0/">知识共享署名-非商业性使用-禁止演绎 4.0 国际许可协议</a>进行许可，非商业转载请注明出处（作者，原文链接），商业转载请联系作者获得授权。</li>
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